Baze Malbus: unlock from completing mission 8
Bodhi Rook: unlock from card packs
Captain Cassian Andor: Unlock from card packs
Ezra Bridger: unlocked after completing mission 6
Han Solo: unlocked after completing mission 1
Jyn Erso: unlock from card packs
Lando Calrissian: unlocked after completing mission 3
Luke Skywalker: unlocked by default
Princess Leia: unlocked by default
Sabine Wren: unlock from card packs